{"product_id":"icp-defrost-control-board-for-yk030g1-heat-pump-timer-defrost-control-ships-today-1","title":"ICP Defrost Control Board for YK030G1 — Heat Pump Timer\/Defrost Control | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis is a genuine OEM ICP\/Tempstar\/Heil defrost control board (Part #34332101) for the YK030G1 heat pump condensing unit. The defrost control board is the brain of your heat pump's defrost cycle — it monitors coil temperature and run time, then commands the reversing valve, outdoor fan, and auxiliary heat to clear ice off the outdoor coil during cold-weather operation. When this 24V board fails, the system can't defrost properly, leading to a frosted-over outdoor unit, weak heating, short cycling, or a unit that won't switch between heating and cooling. Replacing the board restores correct defrost timing and protects the compressor from liquid slugging.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e34332101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eDefrost Control Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICP \/ Tempstar \/ Heil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Voltage\u003c\/td\u003e\n\u003ctd\u003e24V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeat Pump Defrost \/ Reversing Valve Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect-fit replacement for the ICP\/Tempstar\/Heil YK030G1 heat pump and related condensing units that originally shipped with board 34332101. Always verify your existing board's part number and terminal layout against the photo before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the breaker and the outdoor disconnect; verify zero voltage with a multimeter before touching any terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the control panel cover on the condensing unit to expose the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph all low-voltage and line-voltage wiring at the board before disconnecting anything.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Label and unplug each wire\/connector, release the board's standoffs or mounting screws, and lift out the old board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new 34332101 board, set any defrost-timer jumpers to match the original (e.g., 30\/60\/90 min), and reconnect every wire per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, run a heating cycle, and confirm the unit enters and exits defrost correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOutdoor coil ices over and never defrosts\u003c\/li\u003e\n\u003cli\u003eHeat pump won't switch between heating and cooling modes\u003c\/li\u003e\n\u003cli\u003eUnit short cycles or trips on the defrost cycle\u003c\/li\u003e\n\u003cli\u003eBurnt smell, scorched traces, or visible damage on the board\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"ICP","offers":[{"title":"OEM","offer_id":63027188302195,"sku":"34332101","price":155.94,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047505641843,"sku":"34332101-GEN","price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-defrost-34332101_2a0339b1-d8c0-40d6-86f1-b548ee868069.jpg?v=1782887301","url":"https:\/\/nationalhvacparts.com\/products\/icp-defrost-control-board-for-yk030g1-heat-pump-timer-defrost-control-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}